Mounting for oilless air compressor

Abstract

An oilless reciprocating air compressor that is mountable on the inside wall of a cargo container. The compressor has a high strength cast metal crank case and a lighter motor housing attached thereto. A special bracket is provided that attaches to both the crank case and the motor housing to support the motor shaft in a horizontal plane and the opposed cylinders of the compressor in a vertical plane adjacent to the wall. Because this compressor mounted inside the container cooling fans and the like are not required, thus lightening the compressor and allowing for a compact unit that can be safely secured to the cargo container wall.

What is claimed is: 
     
       1. An oilless reciprocating air compressor for use inside an air conditioned cargo container that includes a motor housing containing a stator and a shaft mounted rotor, said shaft being rotatably supported upon sealed bearings,   a high strength crank case secured to one end of said motor housing with one end of said shaft extending into said crank case,   at least one cylinder mounted upon the crank case, and containing piston means connected to the shaft by rod means,   a plate mounted on said motor housing, said plate being parallel to the axis of said cylinder,   a bracket means having a base leg secured to said plate and an arm secured to said crank case, and   fastening means for securing the base leg of said bracket means to a vertical inside wall of the cargo container with the shaft being horizontally disposed and the cylinder being vertically disposed adjacent said wall.   
     
     
       2. The compressor according to claim 1, wherein said cylinder comprises a pair of opposed cylinders, said cylinders being coaligned along a common axis. 
     
     
       3. The compressor according to claim 1, wherein said cylinder comprises a plurality of cylinders. 
     
     
       4. The air compressed of claim 1 wherein said crank case includes a bolting flange and the arm of said bracket means is attached to the bolting flange by threaded means. 
     
     
       5. The air compressor of claim 1 that further includes a bypass line for placing the crank case in fluid flow communication with the cylinder. 
     
     
       6. The air compressor of claim 1 wherein the external surfaces of the cylinder include cooling fins whereby the cylinder is cooled by conditioned air contained inside said cargo container. 
     
     
       7. The air compressor of claim 1 wherein said motor housing is cylindrically shaped and said plate is mounted in tangential contact against the motor housing. 
     
     
       8. The air compressor of claim 1 wherein the crank case has greater load carrying capacity than the motor housing. 
     
     
       9. The air compressor of claim 6 wherein both the crank case and the motor housing are formed of metal. 
     
     
       10. The air compressor of claim 1 wherein said compressor further includes a discharge line for exhausting high pressure air from said cylinder and membrane means for extracting nitrogen gas from the high pressure air and delivering said nitrogen gas into said cargo container. 
     
     
       11. A method for using an oilless reciprocating air compressor inside an air conditioned cargo container, the compressor being of the type that includes: a motor housing containing a stator and a shaft mounted rotor, said shaft being rotatably supported upon sealed bearings;   a high strength crank case secured to one end of said motor housing with one end of said shaft extending into said crank case; and   a pair of opposed cylinders mounted upon the crank case, said cylinders being coaligned along a common axis and containing piston means connected to the shaft by rod means;   the method comprising the steps of: mounting a plate on said motor housing, said plate being parallel to the axis of said cylinders;   securing said plate to an arm portion of a bracket, and securing a base leg portion of said bracket to the crank case of the motor housing, to securely hold the motor housing in said bracket; and   securing the bracket to a vertical inside wall of the cargo container with the shaft being horizontally disposed and the cylinders being vertically disposed adjacent said wall.